diff --git a/core/include/fpdfapi/fpdf_pageobj.h b/core/include/fpdfapi/fpdf_pageobj.h
index ca062b3..3336d0b 100644
--- a/core/include/fpdfapi/fpdf_pageobj.h
+++ b/core/include/fpdfapi/fpdf_pageobj.h
@@ -7,8 +7,8 @@
 #ifndef CORE_INCLUDE_FPDFAPI_FPDF_PAGEOBJ_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_PAGEOBJ_H_
 
+#include "core/include/fpdfapi/fpdf_resource.h"
 #include "core/include/fxge/fx_ge.h"
-#include "fpdf_resource.h"
 
 class CPDF_ClipPath;
 class CPDF_ClipPathData;
diff --git a/core/include/fpdfapi/fpdf_resource.h b/core/include/fpdfapi/fpdf_resource.h
index b10a01c..bc71e7a 100644
--- a/core/include/fpdfapi/fpdf_resource.h
+++ b/core/include/fpdfapi/fpdf_resource.h
@@ -9,9 +9,9 @@
 
 #include <map>
 
+#include "core/include/fpdfapi/fpdf_parser.h"
 #include "core/include/fxcrt/fx_system.h"
 #include "core/include/fxge/fx_font.h"
-#include "fpdf_parser.h"
 
 class CFX_CTTGSUBTable;
 class CFX_DIBitmap;
diff --git a/core/include/fpdfapi/fpdf_serial.h b/core/include/fpdfapi/fpdf_serial.h
index b0989f7..5f493c4 100644
--- a/core/include/fpdfapi/fpdf_serial.h
+++ b/core/include/fpdfapi/fpdf_serial.h
@@ -7,12 +7,14 @@
 #ifndef CORE_INCLUDE_FPDFAPI_FPDF_SERIAL_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_SERIAL_H_
 
-#include "fpdf_page.h"
-#include "fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_page.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
 
 class CPDF_ObjectStream;
 class CPDF_XRefStream;
+
 CFX_ByteTextBuf& operator<<(CFX_ByteTextBuf& buf, const CPDF_Object* pObj);
+
 #define FPDFCREATE_INCREMENTAL 1
 #define FPDFCREATE_NO_ORIGINAL 2
 #define FPDFCREATE_PROGRESSIVE 4